Henry Gamble Davidson was the fifth son of Rev. Andrew Baker Davidson and wife Susan Dorman. He was raised in Rockbridge County, Virginia, and attended Washington College, graduating with his Doctor of Medicine degree. He settled in Richmond, Virginia. He joined the Confederate States Army as a medical officer in the Virginia Infantry, during the US Civil War. After the war, he became the president of Southern Insurance Company of Richmond. He died in January, 1884.

Additional information:

'''The Children of Pride''', by Robert Mason Myers, published by Yale University Press, 1972. --: "After the war he returned to Richmond, where he served briefly as president of the Southern Insurance Company. By 1870 he had settled in Lexington, where he died in January 1884. He was buried in the Stonewall Jackson Memorial Cemetery."